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For questions about Read Only Memory.

2
votes
3answers
225 views

What home computer was the first to use a external ROM cartridge?

When was the external ROM cartridge first used and what home computer was the first to use it?
1
vote
2answers
221 views

Commodore Amiga 600 Software Failure. “Error: 8000 0004 Task: 000026D0”

Software Failure on Commodore Amiga 600 when I insert a floppy in drive. Software Failure. Press left mouse button to continue. Error: 8000 0004 Task: 000026D0 Independent from the floppy I ...
6
votes
0answers
152 views

Did Hewlett Packard really allow the use of the HP48 ROMs in emulators?

On the FAQ of the emu48 software, a famous emulator for HP38/39/40/48/49 calculators (http://hp.giesselink.com/emu48faq.htm#ROM), we can find the following assertion: In general all HP-ROM files ...
6
votes
1answer
215 views

Can the system's BIOS come from an ISA card?

If an ISA card was configured to respond to the address range of the system's BIOS (and the BIOS chips removed), could you boot from it in the same way as the system's default BIOS? Specifically, I'm ...
5
votes
2answers
142 views

How to debug BIOS ROM incompatibility?

I'd like to use the XT-IDE Universal BIOS with an IBM XT 286 (5162), but it's known to be incompatible. With the card installed, it will not boot from a floppy from which it would otherwise boot (it ...
4
votes
2answers
432 views

Maximum size of 8-bit computer cartridges

What was the largest cartridge produced, or possible, for any 8-bit home computer? That is, the later 8 or 16-bit console cartridges could be surprisingly large, up to several megabytes in some cases,...
5
votes
1answer
178 views

Collection of older EPROM IC's

I acquired a collection of older EPROM IC's and am wondering what the rarity of them are or if they are rather common. Do people collect these items? 89142 NM27C512Q ~~ B9212 NM27C512Q ~~ B9312 ...
93
votes
2answers
16k views

How did Commodore's anti-Microsoft Easter Egg work?

A couple years ago the Toronto PET Users Group published an article (The Great Commodore/Microsoft Easter Egg War, on p. 7) about a newly discovered anti-Microsoft Easter Egg that Commodore hid in the ...
12
votes
3answers
851 views

Speed of early ROM versus RAM chips

In the late seventies, up through around 1981, the maximum access speed of off-the-shelf RAM chips was around 2.6 MHz. Did the same speed limit apply to ROM chips of the same era? If not, what would ...
13
votes
2answers
395 views

Best way to locate data on ROM? (6502 Processor)

Lately I've been interested in how old machines work, in particular an NES. While there are quite a few resources on the basic operations and even some games that have been totally broken down byte by ...
43
votes
4answers
6k views

Why would older video games include fragments of source code?

One thing that was surprisingly common in older video games (around the same era assembly language was king) was the inclusion of uncompiled, plaintext source code in the ROM. You can see many ...
85
votes
16answers
19k views

Does “Disk Operating System” imply that there was a “non-disk” Operating System?

In the 1980's at primary school we saw MS DOS and DR DOS competing before Windows 3.1 and subsequent releases took over that space. At home we had Apple II's which booted up to a BASIC prompt. On ...
8
votes
2answers
758 views

How to get a dump of a particular ROM?

How do I create a dump of a Game Boy game so that I can have it for backup as a ROM? I know that I can download the ROM (though slightly illegal) if I really wanted to, but I want to know "how" ROM ...
11
votes
1answer
429 views

What kind of EPROM was used for the Apple //e character generator, and how do I write a new one?

I have an old Apple //e clone, bought in Brazil (but assembled who-knows-where-on-Earth) that has not been touched for over 15 years. At least, from what I could see, it is a //e -- but not enhanced, ...
14
votes
2answers
480 views

Historical price of ROM

Historical price charts for RAM are quite readily available, e.g. in the mid-seventies a ballpark figure was a penny a byte. What was the price of ROM (assuming you were getting the chips produced in ...
9
votes
1answer
419 views

Restore original ROM on PalmOne m515

I've recently bought an old Palm m515 PDA. It seems that the previous owner has removed some of the built-in applications like Calendar and Contacts from it, because when I want to start them it says ...
8
votes
2answers
1k views

What did the Supercard “patch” program actually do to GBA and NDS ROMs to make them playable?

The Supercard is a flash cart for the Game Boy advance which can play ROMs and other files off of assorted flash memory. I recently found my Supercard SD and Superkey for NDS, which acts as a ...
7
votes
1answer
218 views

ROM programs on the Sony MSX HitBit HB-501

I have acquired a Sony MSX HB-501 F (F stands for France, it only defines the keyboard's layout). It is fully functionnal, I can play games from cartridges on it and it displays MSX-BASIC if no ...
7
votes
2answers
70 views

Is there any persistent storage in a NEC MobilePro PocketPC?

I have recently acquired a NEC MobilePro 790 PocketPc from 2001. The specifications says that the device has 48MB memory, including 32MB of RAM and 16MB of flash storage. It also has a ROM that ...
7
votes
3answers
1k views

Extended ROMs on the Amiga CD32 and CDTV

Continuing my series of questions about Amiga ROMs :-) The Commodore CDTV contained a normal Kickstart 1.3 ROM, plus an "extended ROM". From http://www.l8r.net/technical/cdtv-technical.html: The ...
10
votes
1answer
465 views

Does an Apple //e actually have 64KB of RAM?

Inspired by this question about the C64, I was curious if the Apple //e (and I suppose //c and IIgs, though not sure of ][+) somehow had a similar behavior. In short, we know that the Apple ROMs start ...
5
votes
2answers
474 views

Arcade games in Apple IIc's ROM

Is there a website where I can find the old games that where pre-installed in the Apple IIc ROM? When I could not get an OS disk, I could still have some fun with my Apple IIc by playing those arcade ...
6
votes
2answers
892 views

Dumping Nintendo 64 cartridges without a backup device

I've seen various posts online about Nintendo cartridge dumping. Two popular posts which come to mind are Thijs Alkemade's Game Boy cartridge dumping on a Raspberry Pi series and NintendoPlayer's ...
12
votes
1answer
270 views

What's the difference between Williams Earthshaker pinball ROMs L-3 and F-1?

I acquired a Williams "Earthshaker!" pinball machine several years ago. It came with the version L-1 ROM installed. I noticed that sometimes balls would get stuck in the shelter kick-back-up mechanism ...
30
votes
7answers
3k views

Is it legal to download ROM images from shared or internet archives?

Is it generally legal to download older ROM images of commercial software and games for non-commercial use in a retro computing system (emulated or otherwise)? (Note that this question implies no ...
15
votes
3answers
490 views

What is the relationship between solid-state ROM and inaccessible content in arcade games?

I was browsing through tcrf.net, which specializes in displaying unused programming and content left in games by developers, and came across this page: https://tcrf.net/Tank Specifically, the ...
5
votes
1answer
167 views

Homemade ROM cartridge for Thomson TO7/70 home computer

I recently acquired a Thomson TO7/70 home computer. It came without any MEMO7 cartridges (ROM cartridges) that are necessary to properly use it. I found images of the ROMS, and a schematic, so in ...